PartsTable
Technical Data Sheet
S74-1 ✓ Verified by PartsTable
· ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The VALVE,CHECK is a the manufacturer industrial component. Key specifications include material: RUBBER, outside_diameter: 3.520 INCHES NOMINAL IN, center_hole_diameter: 3.085 INCHES MINIMUM AND 3.115 INCHES MAXIMUM IN, elongation_percentage: 160 MAXIMUM, cross-sectional_height: 0.210 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-594-5407, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
S74-1
NSN: 5330-00-594-5407
FSC: 5330
CAGE: 20149 — INTRUPA MFG CO (USA)
SPECIFICATIONS
materialRUBBER
outside_diameter3.520 INCHES NOMINAL IN
center_hole_diameter3.085 INCHES MINIMUM AND 3.115 INCHES MAXIMUM IN
elongation_percentage160 MAXIMUM
cross-sectional_height0.210 INCHES NOMINAL IN
NSN5330-00-594-5407
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: S74-1 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESCROSS-SECTIONAL SHAPE STYLE:116 IRREGULAR SHAPE FROM OLD FIIG A03200
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
57541Interchangeable
interchangeable cross-reference
interchangeable
B28-20-5-5-8Interchangeable
interchangeable cross-reference
interchangeable
R645Interchangeable
interchangeable cross-reference
interchangeable
565013Interchangeable
interchangeable cross-reference
interchangeable
SK46969PC16-3Interchangeable
interchangeable cross-reference
interchangeable
3600-254REVAPCAN6227-41Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S74-1?
S74-1 is a VALVE,CHECK.
What parts can replace S74-1?
There are 27 known substitutes for S74-1: 57541, B28-20-5-5-8, R645 and 24 more. Substitute compatibility should be verified for your specific system.
Is S74-1 still available?
S74-1 is currently cancelled.
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